1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/net/team/team.c - Network team device driver 4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com> 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/types.h> 9 #include <linux/module.h> 10 #include <linux/init.h> 11 #include <linux/slab.h> 12 #include <linux/rcupdate.h> 13 #include <linux/errno.h> 14 #include <linux/ctype.h> 15 #include <linux/notifier.h> 16 #include <linux/netdevice.h> 17 #include <linux/netpoll.h> 18 #include <linux/if_vlan.h> 19 #include <linux/if_arp.h> 20 #include <linux/socket.h> 21 #include <linux/etherdevice.h> 22 #include <linux/rtnetlink.h> 23 #include <net/rtnetlink.h> 24 #include <net/genetlink.h> 25 #include <net/netlink.h> 26 #include <net/sch_generic.h> 27 #include <generated/utsrelease.h> 28 #include <linux/if_team.h> 29 30 #define DRV_NAME "team" 31 32 33 /********** 34 * Helpers 35 **********/ 36 37 static struct team_port *team_port_get_rtnl(const struct net_device *dev) 38 { 39 struct team_port *port = rtnl_dereference(dev->rx_handler_data); 40 41 return netif_is_team_port(dev) ? port : NULL; 42 } 43 44 /* 45 * Since the ability to change device address for open port device is tested in 46 * team_port_add, this function can be called without control of return value 47 */ 48 static int __set_port_dev_addr(struct net_device *port_dev, 49 const unsigned char *dev_addr) 50 { 51 struct sockaddr_storage addr; 52 53 memcpy(addr.__data, dev_addr, port_dev->addr_len); 54 addr.ss_family = port_dev->type; 55 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL); 56 } 57 58 static int team_port_set_orig_dev_addr(struct team_port *port) 59 { 60 return __set_port_dev_addr(port->dev, port->orig.dev_addr); 61 } 62 63 static int team_port_set_team_dev_addr(struct team *team, 64 struct team_port *port) 65 { 66 return __set_port_dev_addr(port->dev, team->dev->dev_addr); 67 } 68 69 int team_modeop_port_enter(struct team *team, struct team_port *port) 70 { 71 return team_port_set_team_dev_addr(team, port); 72 } 73 EXPORT_SYMBOL(team_modeop_port_enter); 74 75 void team_modeop_port_change_dev_addr(struct team *team, 76 struct team_port *port) 77 { 78 team_port_set_team_dev_addr(team, port); 79 } 80 EXPORT_SYMBOL(team_modeop_port_change_dev_addr); 81 82 static void team_lower_state_changed(struct team_port *port) 83 { 84 struct netdev_lag_lower_state_info info; 85 86 info.link_up = port->linkup; 87 info.tx_enabled = team_port_enabled(port); 88 netdev_lower_state_changed(port->dev, &info); 89 } 90 91 static void team_refresh_port_linkup(struct team_port *port) 92 { 93 bool new_linkup = port->user.linkup_enabled ? port->user.linkup : 94 port->state.linkup; 95 96 if (port->linkup != new_linkup) { 97 port->linkup = new_linkup; 98 team_lower_state_changed(port); 99 } 100 } 101 102 103 /******************* 104 * Options handling 105 *******************/ 106 107 struct team_option_inst { /* One for each option instance */ 108 struct list_head list; 109 struct list_head tmp_list; 110 struct team_option *option; 111 struct team_option_inst_info info; 112 bool changed; 113 bool removed; 114 }; 115 116 static struct team_option *__team_find_option(struct team *team, 117 const char *opt_name) 118 { 119 struct team_option *option; 120 121 list_for_each_entry(option, &team->option_list, list) { 122 if (strcmp(option->name, opt_name) == 0) 123 return option; 124 } 125 return NULL; 126 } 127 128 static void __team_option_inst_del(struct team_option_inst *opt_inst) 129 { 130 list_del(&opt_inst->list); 131 kfree(opt_inst); 132 } 133 134 static void __team_option_inst_del_option(struct team *team, 135 struct team_option *option) 136 { 137 struct team_option_inst *opt_inst, *tmp; 138 139 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 140 if (opt_inst->option == option) 141 __team_option_inst_del(opt_inst); 142 } 143 } 144 145 static int __team_option_inst_add(struct team *team, struct team_option *option, 146 struct team_port *port) 147 { 148 struct team_option_inst *opt_inst; 149 unsigned int array_size; 150 unsigned int i; 151 int err; 152 153 array_size = option->array_size; 154 if (!array_size) 155 array_size = 1; /* No array but still need one instance */ 156 157 for (i = 0; i < array_size; i++) { 158 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL); 159 if (!opt_inst) 160 return -ENOMEM; 161 opt_inst->option = option; 162 opt_inst->info.port = port; 163 opt_inst->info.array_index = i; 164 opt_inst->changed = true; 165 opt_inst->removed = false; 166 list_add_tail(&opt_inst->list, &team->option_inst_list); 167 if (option->init) { 168 err = option->init(team, &opt_inst->info); 169 if (err) 170 return err; 171 } 172 173 } 174 return 0; 175 } 176 177 static int __team_option_inst_add_option(struct team *team, 178 struct team_option *option) 179 { 180 int err; 181 182 if (!option->per_port) { 183 err = __team_option_inst_add(team, option, NULL); 184 if (err) 185 goto inst_del_option; 186 } 187 return 0; 188 189 inst_del_option: 190 __team_option_inst_del_option(team, option); 191 return err; 192 } 193 194 static void __team_option_inst_mark_removed_option(struct team *team, 195 struct team_option *option) 196 { 197 struct team_option_inst *opt_inst; 198 199 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 200 if (opt_inst->option == option) { 201 opt_inst->changed = true; 202 opt_inst->removed = true; 203 } 204 } 205 } 206 207 static void __team_option_inst_del_port(struct team *team, 208 struct team_port *port) 209 { 210 struct team_option_inst *opt_inst, *tmp; 211 212 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 213 if (opt_inst->option->per_port && 214 opt_inst->info.port == port) 215 __team_option_inst_del(opt_inst); 216 } 217 } 218 219 static int __team_option_inst_add_port(struct team *team, 220 struct team_port *port) 221 { 222 struct team_option *option; 223 int err; 224 225 list_for_each_entry(option, &team->option_list, list) { 226 if (!option->per_port) 227 continue; 228 err = __team_option_inst_add(team, option, port); 229 if (err) 230 goto inst_del_port; 231 } 232 return 0; 233 234 inst_del_port: 235 __team_option_inst_del_port(team, port); 236 return err; 237 } 238 239 static void __team_option_inst_mark_removed_port(struct team *team, 240 struct team_port *port) 241 { 242 struct team_option_inst *opt_inst; 243 244 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 245 if (opt_inst->info.port == port) { 246 opt_inst->changed = true; 247 opt_inst->removed = true; 248 } 249 } 250 } 251 252 static int __team_options_register(struct team *team, 253 const struct team_option *option, 254 size_t option_count) 255 { 256 int i; 257 struct team_option **dst_opts; 258 int err; 259 260 dst_opts = kcalloc(option_count, sizeof(struct team_option *), 261 GFP_KERNEL); 262 if (!dst_opts) 263 return -ENOMEM; 264 for (i = 0; i < option_count; i++, option++) { 265 if (__team_find_option(team, option->name)) { 266 err = -EEXIST; 267 goto alloc_rollback; 268 } 269 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL); 270 if (!dst_opts[i]) { 271 err = -ENOMEM; 272 goto alloc_rollback; 273 } 274 } 275 276 for (i = 0; i < option_count; i++) { 277 err = __team_option_inst_add_option(team, dst_opts[i]); 278 if (err) 279 goto inst_rollback; 280 list_add_tail(&dst_opts[i]->list, &team->option_list); 281 } 282 283 kfree(dst_opts); 284 return 0; 285 286 inst_rollback: 287 for (i--; i >= 0; i--) 288 __team_option_inst_del_option(team, dst_opts[i]); 289 290 i = option_count; 291 alloc_rollback: 292 for (i--; i >= 0; i--) 293 kfree(dst_opts[i]); 294 295 kfree(dst_opts); 296 return err; 297 } 298 299 static void __team_options_mark_removed(struct team *team, 300 const struct team_option *option, 301 size_t option_count) 302 { 303 int i; 304 305 for (i = 0; i < option_count; i++, option++) { 306 struct team_option *del_opt; 307 308 del_opt = __team_find_option(team, option->name); 309 if (del_opt) 310 __team_option_inst_mark_removed_option(team, del_opt); 311 } 312 } 313 314 static void __team_options_unregister(struct team *team, 315 const struct team_option *option, 316 size_t option_count) 317 { 318 int i; 319 320 for (i = 0; i < option_count; i++, option++) { 321 struct team_option *del_opt; 322 323 del_opt = __team_find_option(team, option->name); 324 if (del_opt) { 325 __team_option_inst_del_option(team, del_opt); 326 list_del(&del_opt->list); 327 kfree(del_opt); 328 } 329 } 330 } 331 332 static void __team_options_change_check(struct team *team); 333 334 int team_options_register(struct team *team, 335 const struct team_option *option, 336 size_t option_count) 337 { 338 int err; 339 340 err = __team_options_register(team, option, option_count); 341 if (err) 342 return err; 343 __team_options_change_check(team); 344 return 0; 345 } 346 EXPORT_SYMBOL(team_options_register); 347 348 void team_options_unregister(struct team *team, 349 const struct team_option *option, 350 size_t option_count) 351 { 352 __team_options_mark_removed(team, option, option_count); 353 __team_options_change_check(team); 354 __team_options_unregister(team, option, option_count); 355 } 356 EXPORT_SYMBOL(team_options_unregister); 357 358 static int team_option_get(struct team *team, 359 struct team_option_inst *opt_inst, 360 struct team_gsetter_ctx *ctx) 361 { 362 if (!opt_inst->option->getter) 363 return -EOPNOTSUPP; 364 return opt_inst->option->getter(team, ctx); 365 } 366 367 static int team_option_set(struct team *team, 368 struct team_option_inst *opt_inst, 369 struct team_gsetter_ctx *ctx) 370 { 371 if (!opt_inst->option->setter) 372 return -EOPNOTSUPP; 373 return opt_inst->option->setter(team, ctx); 374 } 375 376 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info) 377 { 378 struct team_option_inst *opt_inst; 379 380 opt_inst = container_of(opt_inst_info, struct team_option_inst, info); 381 opt_inst->changed = true; 382 } 383 EXPORT_SYMBOL(team_option_inst_set_change); 384 385 void team_options_change_check(struct team *team) 386 { 387 __team_options_change_check(team); 388 } 389 EXPORT_SYMBOL(team_options_change_check); 390 391 392 /**************** 393 * Mode handling 394 ****************/ 395 396 static LIST_HEAD(mode_list); 397 static DEFINE_SPINLOCK(mode_list_lock); 398 399 struct team_mode_item { 400 struct list_head list; 401 const struct team_mode *mode; 402 }; 403 404 static struct team_mode_item *__find_mode(const char *kind) 405 { 406 struct team_mode_item *mitem; 407 408 list_for_each_entry(mitem, &mode_list, list) { 409 if (strcmp(mitem->mode->kind, kind) == 0) 410 return mitem; 411 } 412 return NULL; 413 } 414 415 static bool is_good_mode_name(const char *name) 416 { 417 while (*name != '\0') { 418 if (!isalpha(*name) && !isdigit(*name) && *name != '_') 419 return false; 420 name++; 421 } 422 return true; 423 } 424 425 int team_mode_register(const struct team_mode *mode) 426 { 427 int err = 0; 428 struct team_mode_item *mitem; 429 430 if (!is_good_mode_name(mode->kind) || 431 mode->priv_size > TEAM_MODE_PRIV_SIZE) 432 return -EINVAL; 433 434 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL); 435 if (!mitem) 436 return -ENOMEM; 437 438 spin_lock(&mode_list_lock); 439 if (__find_mode(mode->kind)) { 440 err = -EEXIST; 441 kfree(mitem); 442 goto unlock; 443 } 444 mitem->mode = mode; 445 list_add_tail(&mitem->list, &mode_list); 446 unlock: 447 spin_unlock(&mode_list_lock); 448 return err; 449 } 450 EXPORT_SYMBOL(team_mode_register); 451 452 void team_mode_unregister(const struct team_mode *mode) 453 { 454 struct team_mode_item *mitem; 455 456 spin_lock(&mode_list_lock); 457 mitem = __find_mode(mode->kind); 458 if (mitem) { 459 list_del_init(&mitem->list); 460 kfree(mitem); 461 } 462 spin_unlock(&mode_list_lock); 463 } 464 EXPORT_SYMBOL(team_mode_unregister); 465 466 static const struct team_mode *team_mode_get(const char *kind) 467 { 468 struct team_mode_item *mitem; 469 const struct team_mode *mode = NULL; 470 471 if (!try_module_get(THIS_MODULE)) 472 return NULL; 473 474 spin_lock(&mode_list_lock); 475 mitem = __find_mode(kind); 476 if (!mitem) { 477 spin_unlock(&mode_list_lock); 478 request_module("team-mode-%s", kind); 479 spin_lock(&mode_list_lock); 480 mitem = __find_mode(kind); 481 } 482 if (mitem) { 483 mode = mitem->mode; 484 if (!try_module_get(mode->owner)) 485 mode = NULL; 486 } 487 488 spin_unlock(&mode_list_lock); 489 module_put(THIS_MODULE); 490 return mode; 491 } 492 493 static void team_mode_put(const struct team_mode *mode) 494 { 495 module_put(mode->owner); 496 } 497 498 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) 499 { 500 dev_kfree_skb_any(skb); 501 return false; 502 } 503 504 static rx_handler_result_t team_dummy_receive(struct team *team, 505 struct team_port *port, 506 struct sk_buff *skb) 507 { 508 return RX_HANDLER_ANOTHER; 509 } 510 511 static const struct team_mode __team_no_mode = { 512 .kind = "*NOMODE*", 513 }; 514 515 static bool team_is_mode_set(struct team *team) 516 { 517 return team->mode != &__team_no_mode; 518 } 519 520 static void team_set_no_mode(struct team *team) 521 { 522 team->user_carrier_enabled = false; 523 team->mode = &__team_no_mode; 524 } 525 526 static void team_adjust_ops(struct team *team) 527 { 528 /* 529 * To avoid checks in rx/tx skb paths, ensure here that non-null and 530 * correct ops are always set. 531 */ 532 533 if (!team->en_port_count || !team_is_mode_set(team) || 534 !team->mode->ops->transmit) 535 team->ops.transmit = team_dummy_transmit; 536 else 537 team->ops.transmit = team->mode->ops->transmit; 538 539 if (!team->en_port_count || !team_is_mode_set(team) || 540 !team->mode->ops->receive) 541 team->ops.receive = team_dummy_receive; 542 else 543 team->ops.receive = team->mode->ops->receive; 544 } 545 546 /* 547 * We can benefit from the fact that it's ensured no port is present 548 * at the time of mode change. Therefore no packets are in fly so there's no 549 * need to set mode operations in any special way. 550 */ 551 static int __team_change_mode(struct team *team, 552 const struct team_mode *new_mode) 553 { 554 /* Check if mode was previously set and do cleanup if so */ 555 if (team_is_mode_set(team)) { 556 void (*exit_op)(struct team *team) = team->ops.exit; 557 558 /* Clear ops area so no callback is called any longer */ 559 memset(&team->ops, 0, sizeof(struct team_mode_ops)); 560 team_adjust_ops(team); 561 562 if (exit_op) 563 exit_op(team); 564 team_mode_put(team->mode); 565 team_set_no_mode(team); 566 /* zero private data area */ 567 memset(&team->mode_priv, 0, 568 sizeof(struct team) - offsetof(struct team, mode_priv)); 569 } 570 571 if (!new_mode) 572 return 0; 573 574 if (new_mode->ops->init) { 575 int err; 576 577 err = new_mode->ops->init(team); 578 if (err) 579 return err; 580 } 581 582 team->mode = new_mode; 583 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); 584 team_adjust_ops(team); 585 586 return 0; 587 } 588 589 static int team_change_mode(struct team *team, const char *kind) 590 { 591 const struct team_mode *new_mode; 592 struct net_device *dev = team->dev; 593 int err; 594 595 if (!list_empty(&team->port_list)) { 596 netdev_err(dev, "No ports can be present during mode change\n"); 597 return -EBUSY; 598 } 599 600 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) { 601 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 602 return -EINVAL; 603 } 604 605 new_mode = team_mode_get(kind); 606 if (!new_mode) { 607 netdev_err(dev, "Mode \"%s\" not found\n", kind); 608 return -EINVAL; 609 } 610 611 err = __team_change_mode(team, new_mode); 612 if (err) { 613 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 614 team_mode_put(new_mode); 615 return err; 616 } 617 618 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 619 return 0; 620 } 621 622 623 /********************* 624 * Peers notification 625 *********************/ 626 627 static void team_notify_peers_work(struct work_struct *work) 628 { 629 struct team *team; 630 int val; 631 632 team = container_of(work, struct team, notify_peers.dw.work); 633 634 if (!rtnl_trylock()) { 635 schedule_delayed_work(&team->notify_peers.dw, 0); 636 return; 637 } 638 val = atomic_dec_if_positive(&team->notify_peers.count_pending); 639 if (val < 0) { 640 rtnl_unlock(); 641 return; 642 } 643 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev); 644 rtnl_unlock(); 645 if (val) 646 schedule_delayed_work(&team->notify_peers.dw, 647 msecs_to_jiffies(team->notify_peers.interval)); 648 } 649 650 static void team_notify_peers(struct team *team) 651 { 652 if (!team->notify_peers.count || !netif_running(team->dev)) 653 return; 654 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending); 655 schedule_delayed_work(&team->notify_peers.dw, 0); 656 } 657 658 static void team_notify_peers_init(struct team *team) 659 { 660 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work); 661 } 662 663 static void team_notify_peers_fini(struct team *team) 664 { 665 cancel_delayed_work_sync(&team->notify_peers.dw); 666 } 667 668 669 /******************************* 670 * Send multicast group rejoins 671 *******************************/ 672 673 static void team_mcast_rejoin_work(struct work_struct *work) 674 { 675 struct team *team; 676 int val; 677 678 team = container_of(work, struct team, mcast_rejoin.dw.work); 679 680 if (!rtnl_trylock()) { 681 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 682 return; 683 } 684 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending); 685 if (val < 0) { 686 rtnl_unlock(); 687 return; 688 } 689 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev); 690 rtnl_unlock(); 691 if (val) 692 schedule_delayed_work(&team->mcast_rejoin.dw, 693 msecs_to_jiffies(team->mcast_rejoin.interval)); 694 } 695 696 static void team_mcast_rejoin(struct team *team) 697 { 698 if (!team->mcast_rejoin.count || !netif_running(team->dev)) 699 return; 700 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending); 701 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 702 } 703 704 static void team_mcast_rejoin_init(struct team *team) 705 { 706 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work); 707 } 708 709 static void team_mcast_rejoin_fini(struct team *team) 710 { 711 cancel_delayed_work_sync(&team->mcast_rejoin.dw); 712 } 713 714 715 /************************ 716 * Rx path frame handler 717 ************************/ 718 719 /* note: already called with rcu_read_lock */ 720 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 721 { 722 struct sk_buff *skb = *pskb; 723 struct team_port *port; 724 struct team *team; 725 rx_handler_result_t res; 726 727 skb = skb_share_check(skb, GFP_ATOMIC); 728 if (!skb) 729 return RX_HANDLER_CONSUMED; 730 731 *pskb = skb; 732 733 port = team_port_get_rcu(skb->dev); 734 team = port->team; 735 if (!team_port_enabled(port)) { 736 /* allow exact match delivery for disabled ports */ 737 res = RX_HANDLER_EXACT; 738 } else { 739 res = team->ops.receive(team, port, skb); 740 } 741 if (res == RX_HANDLER_ANOTHER) { 742 struct team_pcpu_stats *pcpu_stats; 743 744 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 745 u64_stats_update_begin(&pcpu_stats->syncp); 746 pcpu_stats->rx_packets++; 747 pcpu_stats->rx_bytes += skb->len; 748 if (skb->pkt_type == PACKET_MULTICAST) 749 pcpu_stats->rx_multicast++; 750 u64_stats_update_end(&pcpu_stats->syncp); 751 752 skb->dev = team->dev; 753 } else if (res == RX_HANDLER_EXACT) { 754 this_cpu_inc(team->pcpu_stats->rx_nohandler); 755 } else { 756 this_cpu_inc(team->pcpu_stats->rx_dropped); 757 } 758 759 return res; 760 } 761 762 763 /************************************* 764 * Multiqueue Tx port select override 765 *************************************/ 766 767 static int team_queue_override_init(struct team *team) 768 { 769 struct list_head *listarr; 770 unsigned int queue_cnt = team->dev->num_tx_queues - 1; 771 unsigned int i; 772 773 if (!queue_cnt) 774 return 0; 775 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head), 776 GFP_KERNEL); 777 if (!listarr) 778 return -ENOMEM; 779 team->qom_lists = listarr; 780 for (i = 0; i < queue_cnt; i++) 781 INIT_LIST_HEAD(listarr++); 782 return 0; 783 } 784 785 static void team_queue_override_fini(struct team *team) 786 { 787 kfree(team->qom_lists); 788 } 789 790 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id) 791 { 792 return &team->qom_lists[queue_id - 1]; 793 } 794 795 /* 796 * note: already called with rcu_read_lock 797 */ 798 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb) 799 { 800 struct list_head *qom_list; 801 struct team_port *port; 802 803 if (!team->queue_override_enabled || !skb->queue_mapping) 804 return false; 805 qom_list = __team_get_qom_list(team, skb->queue_mapping); 806 list_for_each_entry_rcu(port, qom_list, qom_list) { 807 if (!team_dev_queue_xmit(team, port, skb)) 808 return true; 809 } 810 return false; 811 } 812 813 static void __team_queue_override_port_del(struct team *team, 814 struct team_port *port) 815 { 816 if (!port->queue_id) 817 return; 818 list_del_rcu(&port->qom_list); 819 } 820 821 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port, 822 struct team_port *cur) 823 { 824 if (port->priority < cur->priority) 825 return true; 826 if (port->priority > cur->priority) 827 return false; 828 if (port->index < cur->index) 829 return true; 830 return false; 831 } 832 833 static void __team_queue_override_port_add(struct team *team, 834 struct team_port *port) 835 { 836 struct team_port *cur; 837 struct list_head *qom_list; 838 struct list_head *node; 839 840 if (!port->queue_id) 841 return; 842 qom_list = __team_get_qom_list(team, port->queue_id); 843 node = qom_list; 844 list_for_each_entry(cur, qom_list, qom_list) { 845 if (team_queue_override_port_has_gt_prio_than(port, cur)) 846 break; 847 node = &cur->qom_list; 848 } 849 list_add_tail_rcu(&port->qom_list, node); 850 } 851 852 static void __team_queue_override_enabled_check(struct team *team) 853 { 854 struct team_port *port; 855 bool enabled = false; 856 857 list_for_each_entry(port, &team->port_list, list) { 858 if (port->queue_id) { 859 enabled = true; 860 break; 861 } 862 } 863 if (enabled == team->queue_override_enabled) 864 return; 865 netdev_dbg(team->dev, "%s queue override\n", 866 enabled ? "Enabling" : "Disabling"); 867 team->queue_override_enabled = enabled; 868 } 869 870 static void team_queue_override_port_prio_changed(struct team *team, 871 struct team_port *port) 872 { 873 if (!port->queue_id || team_port_enabled(port)) 874 return; 875 __team_queue_override_port_del(team, port); 876 __team_queue_override_port_add(team, port); 877 __team_queue_override_enabled_check(team); 878 } 879 880 static void team_queue_override_port_change_queue_id(struct team *team, 881 struct team_port *port, 882 u16 new_queue_id) 883 { 884 if (team_port_enabled(port)) { 885 __team_queue_override_port_del(team, port); 886 port->queue_id = new_queue_id; 887 __team_queue_override_port_add(team, port); 888 __team_queue_override_enabled_check(team); 889 } else { 890 port->queue_id = new_queue_id; 891 } 892 } 893 894 static void team_queue_override_port_add(struct team *team, 895 struct team_port *port) 896 { 897 __team_queue_override_port_add(team, port); 898 __team_queue_override_enabled_check(team); 899 } 900 901 static void team_queue_override_port_del(struct team *team, 902 struct team_port *port) 903 { 904 __team_queue_override_port_del(team, port); 905 __team_queue_override_enabled_check(team); 906 } 907 908 909 /**************** 910 * Port handling 911 ****************/ 912 913 static bool team_port_find(const struct team *team, 914 const struct team_port *port) 915 { 916 struct team_port *cur; 917 918 list_for_each_entry(cur, &team->port_list, list) 919 if (cur == port) 920 return true; 921 return false; 922 } 923 924 /* 925 * Enable/disable port by adding to enabled port hashlist and setting 926 * port->index (Might be racy so reader could see incorrect ifindex when 927 * processing a flying packet, but that is not a problem). Write guarded 928 * by team->lock. 929 */ 930 static void team_port_enable(struct team *team, 931 struct team_port *port) 932 { 933 if (team_port_enabled(port)) 934 return; 935 port->index = team->en_port_count++; 936 hlist_add_head_rcu(&port->hlist, 937 team_port_index_hash(team, port->index)); 938 team_adjust_ops(team); 939 team_queue_override_port_add(team, port); 940 if (team->ops.port_enabled) 941 team->ops.port_enabled(team, port); 942 team_notify_peers(team); 943 team_mcast_rejoin(team); 944 team_lower_state_changed(port); 945 } 946 947 static void __reconstruct_port_hlist(struct team *team, int rm_index) 948 { 949 int i; 950 struct team_port *port; 951 952 for (i = rm_index + 1; i < team->en_port_count; i++) { 953 port = team_get_port_by_index(team, i); 954 hlist_del_rcu(&port->hlist); 955 port->index--; 956 hlist_add_head_rcu(&port->hlist, 957 team_port_index_hash(team, port->index)); 958 } 959 } 960 961 static void team_port_disable(struct team *team, 962 struct team_port *port) 963 { 964 if (!team_port_enabled(port)) 965 return; 966 if (team->ops.port_disabled) 967 team->ops.port_disabled(team, port); 968 hlist_del_rcu(&port->hlist); 969 __reconstruct_port_hlist(team, port->index); 970 port->index = -1; 971 team->en_port_count--; 972 team_queue_override_port_del(team, port); 973 team_adjust_ops(team); 974 team_lower_state_changed(port); 975 } 976 977 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 978 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \ 979 NETIF_F_HIGHDMA | NETIF_F_LRO) 980 981 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 982 NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE) 983 984 static void __team_compute_features(struct team *team) 985 { 986 struct team_port *port; 987 netdev_features_t vlan_features = TEAM_VLAN_FEATURES & 988 NETIF_F_ALL_FOR_ALL; 989 netdev_features_t enc_features = TEAM_ENC_FEATURES; 990 unsigned short max_hard_header_len = ETH_HLEN; 991 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE | 992 IFF_XMIT_DST_RELEASE_PERM; 993 994 list_for_each_entry(port, &team->port_list, list) { 995 vlan_features = netdev_increment_features(vlan_features, 996 port->dev->vlan_features, 997 TEAM_VLAN_FEATURES); 998 enc_features = 999 netdev_increment_features(enc_features, 1000 port->dev->hw_enc_features, 1001 TEAM_ENC_FEATURES); 1002 1003 1004 dst_release_flag &= port->dev->priv_flags; 1005 if (port->dev->hard_header_len > max_hard_header_len) 1006 max_hard_header_len = port->dev->hard_header_len; 1007 } 1008 1009 team->dev->vlan_features = vlan_features; 1010 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL | 1011 NETIF_F_HW_VLAN_CTAG_TX | 1012 NETIF_F_HW_VLAN_STAG_TX; 1013 team->dev->hard_header_len = max_hard_header_len; 1014 1015 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 1016 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM)) 1017 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE; 1018 } 1019 1020 static void team_compute_features(struct team *team) 1021 { 1022 mutex_lock(&team->lock); 1023 __team_compute_features(team); 1024 mutex_unlock(&team->lock); 1025 netdev_change_features(team->dev); 1026 } 1027 1028 static int team_port_enter(struct team *team, struct team_port *port) 1029 { 1030 int err = 0; 1031 1032 dev_hold(team->dev); 1033 if (team->ops.port_enter) { 1034 err = team->ops.port_enter(team, port); 1035 if (err) { 1036 netdev_err(team->dev, "Device %s failed to enter team mode\n", 1037 port->dev->name); 1038 goto err_port_enter; 1039 } 1040 } 1041 1042 return 0; 1043 1044 err_port_enter: 1045 dev_put(team->dev); 1046 1047 return err; 1048 } 1049 1050 static void team_port_leave(struct team *team, struct team_port *port) 1051 { 1052 if (team->ops.port_leave) 1053 team->ops.port_leave(team, port); 1054 dev_put(team->dev); 1055 } 1056 1057 #ifdef CONFIG_NET_POLL_CONTROLLER 1058 static int __team_port_enable_netpoll(struct team_port *port) 1059 { 1060 struct netpoll *np; 1061 int err; 1062 1063 np = kzalloc(sizeof(*np), GFP_KERNEL); 1064 if (!np) 1065 return -ENOMEM; 1066 1067 err = __netpoll_setup(np, port->dev); 1068 if (err) { 1069 kfree(np); 1070 return err; 1071 } 1072 port->np = np; 1073 return err; 1074 } 1075 1076 static int team_port_enable_netpoll(struct team_port *port) 1077 { 1078 if (!port->team->dev->npinfo) 1079 return 0; 1080 1081 return __team_port_enable_netpoll(port); 1082 } 1083 1084 static void team_port_disable_netpoll(struct team_port *port) 1085 { 1086 struct netpoll *np = port->np; 1087 1088 if (!np) 1089 return; 1090 port->np = NULL; 1091 1092 __netpoll_free(np); 1093 } 1094 #else 1095 static int team_port_enable_netpoll(struct team_port *port) 1096 { 1097 return 0; 1098 } 1099 static void team_port_disable_netpoll(struct team_port *port) 1100 { 1101 } 1102 #endif 1103 1104 static int team_upper_dev_link(struct team *team, struct team_port *port, 1105 struct netlink_ext_ack *extack) 1106 { 1107 struct netdev_lag_upper_info lag_upper_info; 1108 int err; 1109 1110 lag_upper_info.tx_type = team->mode->lag_tx_type; 1111 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN; 1112 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL, 1113 &lag_upper_info, extack); 1114 if (err) 1115 return err; 1116 port->dev->priv_flags |= IFF_TEAM_PORT; 1117 return 0; 1118 } 1119 1120 static void team_upper_dev_unlink(struct team *team, struct team_port *port) 1121 { 1122 netdev_upper_dev_unlink(port->dev, team->dev); 1123 port->dev->priv_flags &= ~IFF_TEAM_PORT; 1124 } 1125 1126 static void __team_port_change_port_added(struct team_port *port, bool linkup); 1127 static int team_dev_type_check_change(struct net_device *dev, 1128 struct net_device *port_dev); 1129 1130 static int team_port_add(struct team *team, struct net_device *port_dev, 1131 struct netlink_ext_ack *extack) 1132 { 1133 struct net_device *dev = team->dev; 1134 struct team_port *port; 1135 char *portname = port_dev->name; 1136 int err; 1137 1138 if (port_dev->flags & IFF_LOOPBACK) { 1139 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port"); 1140 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1141 portname); 1142 return -EINVAL; 1143 } 1144 1145 if (netif_is_team_port(port_dev)) { 1146 NL_SET_ERR_MSG(extack, "Device is already a port of a team device"); 1147 netdev_err(dev, "Device %s is already a port " 1148 "of a team device\n", portname); 1149 return -EBUSY; 1150 } 1151 1152 if (dev == port_dev) { 1153 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself"); 1154 netdev_err(dev, "Cannot enslave team device to itself\n"); 1155 return -EINVAL; 1156 } 1157 1158 if (netdev_has_upper_dev(dev, port_dev)) { 1159 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface"); 1160 netdev_err(dev, "Device %s is already an upper device of the team interface\n", 1161 portname); 1162 return -EBUSY; 1163 } 1164 1165 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1166 vlan_uses_dev(dev)) { 1167 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up"); 1168 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1169 portname); 1170 return -EPERM; 1171 } 1172 1173 err = team_dev_type_check_change(dev, port_dev); 1174 if (err) 1175 return err; 1176 1177 if (port_dev->flags & IFF_UP) { 1178 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port"); 1179 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1180 portname); 1181 return -EBUSY; 1182 } 1183 1184 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1185 GFP_KERNEL); 1186 if (!port) 1187 return -ENOMEM; 1188 1189 port->dev = port_dev; 1190 port->team = team; 1191 INIT_LIST_HEAD(&port->qom_list); 1192 1193 port->orig.mtu = port_dev->mtu; 1194 err = dev_set_mtu(port_dev, dev->mtu); 1195 if (err) { 1196 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1197 goto err_set_mtu; 1198 } 1199 1200 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1201 1202 err = team_port_enter(team, port); 1203 if (err) { 1204 netdev_err(dev, "Device %s failed to enter team mode\n", 1205 portname); 1206 goto err_port_enter; 1207 } 1208 1209 err = dev_open(port_dev, extack); 1210 if (err) { 1211 netdev_dbg(dev, "Device %s opening failed\n", 1212 portname); 1213 goto err_dev_open; 1214 } 1215 1216 err = vlan_vids_add_by_dev(port_dev, dev); 1217 if (err) { 1218 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1219 portname); 1220 goto err_vids_add; 1221 } 1222 1223 err = team_port_enable_netpoll(port); 1224 if (err) { 1225 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1226 portname); 1227 goto err_enable_netpoll; 1228 } 1229 1230 if (!(dev->features & NETIF_F_LRO)) 1231 dev_disable_lro(port_dev); 1232 1233 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1234 port); 1235 if (err) { 1236 netdev_err(dev, "Device %s failed to register rx_handler\n", 1237 portname); 1238 goto err_handler_register; 1239 } 1240 1241 err = team_upper_dev_link(team, port, extack); 1242 if (err) { 1243 netdev_err(dev, "Device %s failed to set upper link\n", 1244 portname); 1245 goto err_set_upper_link; 1246 } 1247 1248 err = __team_option_inst_add_port(team, port); 1249 if (err) { 1250 netdev_err(dev, "Device %s failed to add per-port options\n", 1251 portname); 1252 goto err_option_port_add; 1253 } 1254 1255 /* set promiscuity level to new slave */ 1256 if (dev->flags & IFF_PROMISC) { 1257 err = dev_set_promiscuity(port_dev, 1); 1258 if (err) 1259 goto err_set_slave_promisc; 1260 } 1261 1262 /* set allmulti level to new slave */ 1263 if (dev->flags & IFF_ALLMULTI) { 1264 err = dev_set_allmulti(port_dev, 1); 1265 if (err) { 1266 if (dev->flags & IFF_PROMISC) 1267 dev_set_promiscuity(port_dev, -1); 1268 goto err_set_slave_promisc; 1269 } 1270 } 1271 1272 netif_addr_lock_bh(dev); 1273 dev_uc_sync_multiple(port_dev, dev); 1274 dev_mc_sync_multiple(port_dev, dev); 1275 netif_addr_unlock_bh(dev); 1276 1277 port->index = -1; 1278 list_add_tail_rcu(&port->list, &team->port_list); 1279 team_port_enable(team, port); 1280 __team_compute_features(team); 1281 __team_port_change_port_added(port, !!netif_oper_up(port_dev)); 1282 __team_options_change_check(team); 1283 1284 netdev_info(dev, "Port device %s added\n", portname); 1285 1286 return 0; 1287 1288 err_set_slave_promisc: 1289 __team_option_inst_del_port(team, port); 1290 1291 err_option_port_add: 1292 team_upper_dev_unlink(team, port); 1293 1294 err_set_upper_link: 1295 netdev_rx_handler_unregister(port_dev); 1296 1297 err_handler_register: 1298 team_port_disable_netpoll(port); 1299 1300 err_enable_netpoll: 1301 vlan_vids_del_by_dev(port_dev, dev); 1302 1303 err_vids_add: 1304 dev_close(port_dev); 1305 1306 err_dev_open: 1307 team_port_leave(team, port); 1308 team_port_set_orig_dev_addr(port); 1309 1310 err_port_enter: 1311 dev_set_mtu(port_dev, port->orig.mtu); 1312 1313 err_set_mtu: 1314 kfree(port); 1315 1316 return err; 1317 } 1318 1319 static void __team_port_change_port_removed(struct team_port *port); 1320 1321 static int team_port_del(struct team *team, struct net_device *port_dev) 1322 { 1323 struct net_device *dev = team->dev; 1324 struct team_port *port; 1325 char *portname = port_dev->name; 1326 1327 port = team_port_get_rtnl(port_dev); 1328 if (!port || !team_port_find(team, port)) { 1329 netdev_err(dev, "Device %s does not act as a port of this team\n", 1330 portname); 1331 return -ENOENT; 1332 } 1333 1334 team_port_disable(team, port); 1335 list_del_rcu(&port->list); 1336 1337 if (dev->flags & IFF_PROMISC) 1338 dev_set_promiscuity(port_dev, -1); 1339 if (dev->flags & IFF_ALLMULTI) 1340 dev_set_allmulti(port_dev, -1); 1341 1342 team_upper_dev_unlink(team, port); 1343 netdev_rx_handler_unregister(port_dev); 1344 team_port_disable_netpoll(port); 1345 vlan_vids_del_by_dev(port_dev, dev); 1346 dev_uc_unsync(port_dev, dev); 1347 dev_mc_unsync(port_dev, dev); 1348 dev_close(port_dev); 1349 team_port_leave(team, port); 1350 1351 __team_option_inst_mark_removed_port(team, port); 1352 __team_options_change_check(team); 1353 __team_option_inst_del_port(team, port); 1354 __team_port_change_port_removed(port); 1355 1356 team_port_set_orig_dev_addr(port); 1357 dev_set_mtu(port_dev, port->orig.mtu); 1358 kfree_rcu(port, rcu); 1359 netdev_info(dev, "Port device %s removed\n", portname); 1360 __team_compute_features(team); 1361 1362 return 0; 1363 } 1364 1365 1366 /***************** 1367 * Net device ops 1368 *****************/ 1369 1370 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1371 { 1372 ctx->data.str_val = team->mode->kind; 1373 return 0; 1374 } 1375 1376 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1377 { 1378 return team_change_mode(team, ctx->data.str_val); 1379 } 1380 1381 static int team_notify_peers_count_get(struct team *team, 1382 struct team_gsetter_ctx *ctx) 1383 { 1384 ctx->data.u32_val = team->notify_peers.count; 1385 return 0; 1386 } 1387 1388 static int team_notify_peers_count_set(struct team *team, 1389 struct team_gsetter_ctx *ctx) 1390 { 1391 team->notify_peers.count = ctx->data.u32_val; 1392 return 0; 1393 } 1394 1395 static int team_notify_peers_interval_get(struct team *team, 1396 struct team_gsetter_ctx *ctx) 1397 { 1398 ctx->data.u32_val = team->notify_peers.interval; 1399 return 0; 1400 } 1401 1402 static int team_notify_peers_interval_set(struct team *team, 1403 struct team_gsetter_ctx *ctx) 1404 { 1405 team->notify_peers.interval = ctx->data.u32_val; 1406 return 0; 1407 } 1408 1409 static int team_mcast_rejoin_count_get(struct team *team, 1410 struct team_gsetter_ctx *ctx) 1411 { 1412 ctx->data.u32_val = team->mcast_rejoin.count; 1413 return 0; 1414 } 1415 1416 static int team_mcast_rejoin_count_set(struct team *team, 1417 struct team_gsetter_ctx *ctx) 1418 { 1419 team->mcast_rejoin.count = ctx->data.u32_val; 1420 return 0; 1421 } 1422 1423 static int team_mcast_rejoin_interval_get(struct team *team, 1424 struct team_gsetter_ctx *ctx) 1425 { 1426 ctx->data.u32_val = team->mcast_rejoin.interval; 1427 return 0; 1428 } 1429 1430 static int team_mcast_rejoin_interval_set(struct team *team, 1431 struct team_gsetter_ctx *ctx) 1432 { 1433 team->mcast_rejoin.interval = ctx->data.u32_val; 1434 return 0; 1435 } 1436 1437 static int team_port_en_option_get(struct team *team, 1438 struct team_gsetter_ctx *ctx) 1439 { 1440 struct team_port *port = ctx->info->port; 1441 1442 ctx->data.bool_val = team_port_enabled(port); 1443 return 0; 1444 } 1445 1446 static int team_port_en_option_set(struct team *team, 1447 struct team_gsetter_ctx *ctx) 1448 { 1449 struct team_port *port = ctx->info->port; 1450 1451 if (ctx->data.bool_val) 1452 team_port_enable(team, port); 1453 else 1454 team_port_disable(team, port); 1455 return 0; 1456 } 1457 1458 static int team_user_linkup_option_get(struct team *team, 1459 struct team_gsetter_ctx *ctx) 1460 { 1461 struct team_port *port = ctx->info->port; 1462 1463 ctx->data.bool_val = port->user.linkup; 1464 return 0; 1465 } 1466 1467 static void __team_carrier_check(struct team *team); 1468 1469 static int team_user_linkup_option_set(struct team *team, 1470 struct team_gsetter_ctx *ctx) 1471 { 1472 struct team_port *port = ctx->info->port; 1473 1474 port->user.linkup = ctx->data.bool_val; 1475 team_refresh_port_linkup(port); 1476 __team_carrier_check(port->team); 1477 return 0; 1478 } 1479 1480 static int team_user_linkup_en_option_get(struct team *team, 1481 struct team_gsetter_ctx *ctx) 1482 { 1483 struct team_port *port = ctx->info->port; 1484 1485 ctx->data.bool_val = port->user.linkup_enabled; 1486 return 0; 1487 } 1488 1489 static int team_user_linkup_en_option_set(struct team *team, 1490 struct team_gsetter_ctx *ctx) 1491 { 1492 struct team_port *port = ctx->info->port; 1493 1494 port->user.linkup_enabled = ctx->data.bool_val; 1495 team_refresh_port_linkup(port); 1496 __team_carrier_check(port->team); 1497 return 0; 1498 } 1499 1500 static int team_priority_option_get(struct team *team, 1501 struct team_gsetter_ctx *ctx) 1502 { 1503 struct team_port *port = ctx->info->port; 1504 1505 ctx->data.s32_val = port->priority; 1506 return 0; 1507 } 1508 1509 static int team_priority_option_set(struct team *team, 1510 struct team_gsetter_ctx *ctx) 1511 { 1512 struct team_port *port = ctx->info->port; 1513 s32 priority = ctx->data.s32_val; 1514 1515 if (port->priority == priority) 1516 return 0; 1517 port->priority = priority; 1518 team_queue_override_port_prio_changed(team, port); 1519 return 0; 1520 } 1521 1522 static int team_queue_id_option_get(struct team *team, 1523 struct team_gsetter_ctx *ctx) 1524 { 1525 struct team_port *port = ctx->info->port; 1526 1527 ctx->data.u32_val = port->queue_id; 1528 return 0; 1529 } 1530 1531 static int team_queue_id_option_set(struct team *team, 1532 struct team_gsetter_ctx *ctx) 1533 { 1534 struct team_port *port = ctx->info->port; 1535 u16 new_queue_id = ctx->data.u32_val; 1536 1537 if (port->queue_id == new_queue_id) 1538 return 0; 1539 if (new_queue_id >= team->dev->real_num_tx_queues) 1540 return -EINVAL; 1541 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1542 return 0; 1543 } 1544 1545 static const struct team_option team_options[] = { 1546 { 1547 .name = "mode", 1548 .type = TEAM_OPTION_TYPE_STRING, 1549 .getter = team_mode_option_get, 1550 .setter = team_mode_option_set, 1551 }, 1552 { 1553 .name = "notify_peers_count", 1554 .type = TEAM_OPTION_TYPE_U32, 1555 .getter = team_notify_peers_count_get, 1556 .setter = team_notify_peers_count_set, 1557 }, 1558 { 1559 .name = "notify_peers_interval", 1560 .type = TEAM_OPTION_TYPE_U32, 1561 .getter = team_notify_peers_interval_get, 1562 .setter = team_notify_peers_interval_set, 1563 }, 1564 { 1565 .name = "mcast_rejoin_count", 1566 .type = TEAM_OPTION_TYPE_U32, 1567 .getter = team_mcast_rejoin_count_get, 1568 .setter = team_mcast_rejoin_count_set, 1569 }, 1570 { 1571 .name = "mcast_rejoin_interval", 1572 .type = TEAM_OPTION_TYPE_U32, 1573 .getter = team_mcast_rejoin_interval_get, 1574 .setter = team_mcast_rejoin_interval_set, 1575 }, 1576 { 1577 .name = "enabled", 1578 .type = TEAM_OPTION_TYPE_BOOL, 1579 .per_port = true, 1580 .getter = team_port_en_option_get, 1581 .setter = team_port_en_option_set, 1582 }, 1583 { 1584 .name = "user_linkup", 1585 .type = TEAM_OPTION_TYPE_BOOL, 1586 .per_port = true, 1587 .getter = team_user_linkup_option_get, 1588 .setter = team_user_linkup_option_set, 1589 }, 1590 { 1591 .name = "user_linkup_enabled", 1592 .type = TEAM_OPTION_TYPE_BOOL, 1593 .per_port = true, 1594 .getter = team_user_linkup_en_option_get, 1595 .setter = team_user_linkup_en_option_set, 1596 }, 1597 { 1598 .name = "priority", 1599 .type = TEAM_OPTION_TYPE_S32, 1600 .per_port = true, 1601 .getter = team_priority_option_get, 1602 .setter = team_priority_option_set, 1603 }, 1604 { 1605 .name = "queue_id", 1606 .type = TEAM_OPTION_TYPE_U32, 1607 .per_port = true, 1608 .getter = team_queue_id_option_get, 1609 .setter = team_queue_id_option_set, 1610 }, 1611 }; 1612 1613 1614 static int team_init(struct net_device *dev) 1615 { 1616 struct team *team = netdev_priv(dev); 1617 int i; 1618 int err; 1619 1620 team->dev = dev; 1621 team_set_no_mode(team); 1622 1623 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1624 if (!team->pcpu_stats) 1625 return -ENOMEM; 1626 1627 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1628 INIT_HLIST_HEAD(&team->en_port_hlist[i]); 1629 INIT_LIST_HEAD(&team->port_list); 1630 err = team_queue_override_init(team); 1631 if (err) 1632 goto err_team_queue_override_init; 1633 1634 team_adjust_ops(team); 1635 1636 INIT_LIST_HEAD(&team->option_list); 1637 INIT_LIST_HEAD(&team->option_inst_list); 1638 1639 team_notify_peers_init(team); 1640 team_mcast_rejoin_init(team); 1641 1642 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1643 if (err) 1644 goto err_options_register; 1645 netif_carrier_off(dev); 1646 1647 lockdep_register_key(&team->team_lock_key); 1648 __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key); 1649 netdev_lockdep_set_classes(dev); 1650 1651 return 0; 1652 1653 err_options_register: 1654 team_mcast_rejoin_fini(team); 1655 team_notify_peers_fini(team); 1656 team_queue_override_fini(team); 1657 err_team_queue_override_init: 1658 free_percpu(team->pcpu_stats); 1659 1660 return err; 1661 } 1662 1663 static void team_uninit(struct net_device *dev) 1664 { 1665 struct team *team = netdev_priv(dev); 1666 struct team_port *port; 1667 struct team_port *tmp; 1668 1669 mutex_lock(&team->lock); 1670 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1671 team_port_del(team, port->dev); 1672 1673 __team_change_mode(team, NULL); /* cleanup */ 1674 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1675 team_mcast_rejoin_fini(team); 1676 team_notify_peers_fini(team); 1677 team_queue_override_fini(team); 1678 mutex_unlock(&team->lock); 1679 netdev_change_features(dev); 1680 lockdep_unregister_key(&team->team_lock_key); 1681 } 1682 1683 static void team_destructor(struct net_device *dev) 1684 { 1685 struct team *team = netdev_priv(dev); 1686 1687 free_percpu(team->pcpu_stats); 1688 } 1689 1690 static int team_open(struct net_device *dev) 1691 { 1692 return 0; 1693 } 1694 1695 static int team_close(struct net_device *dev) 1696 { 1697 return 0; 1698 } 1699 1700 /* 1701 * note: already called with rcu_read_lock 1702 */ 1703 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1704 { 1705 struct team *team = netdev_priv(dev); 1706 bool tx_success; 1707 unsigned int len = skb->len; 1708 1709 tx_success = team_queue_override_transmit(team, skb); 1710 if (!tx_success) 1711 tx_success = team->ops.transmit(team, skb); 1712 if (tx_success) { 1713 struct team_pcpu_stats *pcpu_stats; 1714 1715 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1716 u64_stats_update_begin(&pcpu_stats->syncp); 1717 pcpu_stats->tx_packets++; 1718 pcpu_stats->tx_bytes += len; 1719 u64_stats_update_end(&pcpu_stats->syncp); 1720 } else { 1721 this_cpu_inc(team->pcpu_stats->tx_dropped); 1722 } 1723 1724 return NETDEV_TX_OK; 1725 } 1726 1727 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1728 struct net_device *sb_dev) 1729 { 1730 /* 1731 * This helper function exists to help dev_pick_tx get the correct 1732 * destination queue. Using a helper function skips a call to 1733 * skb_tx_hash and will put the skbs in the queue we expect on their 1734 * way down to the team driver. 1735 */ 1736 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1737 1738 /* 1739 * Save the original txq to restore before passing to the driver 1740 */ 1741 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1742 1743 if (unlikely(txq >= dev->real_num_tx_queues)) { 1744 do { 1745 txq -= dev->real_num_tx_queues; 1746 } while (txq >= dev->real_num_tx_queues); 1747 } 1748 return txq; 1749 } 1750 1751 static void team_change_rx_flags(struct net_device *dev, int change) 1752 { 1753 struct team *team = netdev_priv(dev); 1754 struct team_port *port; 1755 int inc; 1756 1757 rcu_read_lock(); 1758 list_for_each_entry_rcu(port, &team->port_list, list) { 1759 if (change & IFF_PROMISC) { 1760 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1761 dev_set_promiscuity(port->dev, inc); 1762 } 1763 if (change & IFF_ALLMULTI) { 1764 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1765 dev_set_allmulti(port->dev, inc); 1766 } 1767 } 1768 rcu_read_unlock(); 1769 } 1770 1771 static void team_set_rx_mode(struct net_device *dev) 1772 { 1773 struct team *team = netdev_priv(dev); 1774 struct team_port *port; 1775 1776 rcu_read_lock(); 1777 list_for_each_entry_rcu(port, &team->port_list, list) { 1778 dev_uc_sync_multiple(port->dev, dev); 1779 dev_mc_sync_multiple(port->dev, dev); 1780 } 1781 rcu_read_unlock(); 1782 } 1783 1784 static int team_set_mac_address(struct net_device *dev, void *p) 1785 { 1786 struct sockaddr *addr = p; 1787 struct team *team = netdev_priv(dev); 1788 struct team_port *port; 1789 1790 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1791 return -EADDRNOTAVAIL; 1792 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1793 mutex_lock(&team->lock); 1794 list_for_each_entry(port, &team->port_list, list) 1795 if (team->ops.port_change_dev_addr) 1796 team->ops.port_change_dev_addr(team, port); 1797 mutex_unlock(&team->lock); 1798 return 0; 1799 } 1800 1801 static int team_change_mtu(struct net_device *dev, int new_mtu) 1802 { 1803 struct team *team = netdev_priv(dev); 1804 struct team_port *port; 1805 int err; 1806 1807 /* 1808 * Alhough this is reader, it's guarded by team lock. It's not possible 1809 * to traverse list in reverse under rcu_read_lock 1810 */ 1811 mutex_lock(&team->lock); 1812 team->port_mtu_change_allowed = true; 1813 list_for_each_entry(port, &team->port_list, list) { 1814 err = dev_set_mtu(port->dev, new_mtu); 1815 if (err) { 1816 netdev_err(dev, "Device %s failed to change mtu", 1817 port->dev->name); 1818 goto unwind; 1819 } 1820 } 1821 team->port_mtu_change_allowed = false; 1822 mutex_unlock(&team->lock); 1823 1824 dev->mtu = new_mtu; 1825 1826 return 0; 1827 1828 unwind: 1829 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1830 dev_set_mtu(port->dev, dev->mtu); 1831 team->port_mtu_change_allowed = false; 1832 mutex_unlock(&team->lock); 1833 1834 return err; 1835 } 1836 1837 static void 1838 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1839 { 1840 struct team *team = netdev_priv(dev); 1841 struct team_pcpu_stats *p; 1842 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1843 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0; 1844 unsigned int start; 1845 int i; 1846 1847 for_each_possible_cpu(i) { 1848 p = per_cpu_ptr(team->pcpu_stats, i); 1849 do { 1850 start = u64_stats_fetch_begin_irq(&p->syncp); 1851 rx_packets = p->rx_packets; 1852 rx_bytes = p->rx_bytes; 1853 rx_multicast = p->rx_multicast; 1854 tx_packets = p->tx_packets; 1855 tx_bytes = p->tx_bytes; 1856 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 1857 1858 stats->rx_packets += rx_packets; 1859 stats->rx_bytes += rx_bytes; 1860 stats->multicast += rx_multicast; 1861 stats->tx_packets += tx_packets; 1862 stats->tx_bytes += tx_bytes; 1863 /* 1864 * rx_dropped, tx_dropped & rx_nohandler are u32, 1865 * updated without syncp protection. 1866 */ 1867 rx_dropped += p->rx_dropped; 1868 tx_dropped += p->tx_dropped; 1869 rx_nohandler += p->rx_nohandler; 1870 } 1871 stats->rx_dropped = rx_dropped; 1872 stats->tx_dropped = tx_dropped; 1873 stats->rx_nohandler = rx_nohandler; 1874 } 1875 1876 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1877 { 1878 struct team *team = netdev_priv(dev); 1879 struct team_port *port; 1880 int err; 1881 1882 /* 1883 * Alhough this is reader, it's guarded by team lock. It's not possible 1884 * to traverse list in reverse under rcu_read_lock 1885 */ 1886 mutex_lock(&team->lock); 1887 list_for_each_entry(port, &team->port_list, list) { 1888 err = vlan_vid_add(port->dev, proto, vid); 1889 if (err) 1890 goto unwind; 1891 } 1892 mutex_unlock(&team->lock); 1893 1894 return 0; 1895 1896 unwind: 1897 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1898 vlan_vid_del(port->dev, proto, vid); 1899 mutex_unlock(&team->lock); 1900 1901 return err; 1902 } 1903 1904 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1905 { 1906 struct team *team = netdev_priv(dev); 1907 struct team_port *port; 1908 1909 mutex_lock(&team->lock); 1910 list_for_each_entry(port, &team->port_list, list) 1911 vlan_vid_del(port->dev, proto, vid); 1912 mutex_unlock(&team->lock); 1913 1914 return 0; 1915 } 1916 1917 #ifdef CONFIG_NET_POLL_CONTROLLER 1918 static void team_poll_controller(struct net_device *dev) 1919 { 1920 } 1921 1922 static void __team_netpoll_cleanup(struct team *team) 1923 { 1924 struct team_port *port; 1925 1926 list_for_each_entry(port, &team->port_list, list) 1927 team_port_disable_netpoll(port); 1928 } 1929 1930 static void team_netpoll_cleanup(struct net_device *dev) 1931 { 1932 struct team *team = netdev_priv(dev); 1933 1934 mutex_lock(&team->lock); 1935 __team_netpoll_cleanup(team); 1936 mutex_unlock(&team->lock); 1937 } 1938 1939 static int team_netpoll_setup(struct net_device *dev, 1940 struct netpoll_info *npifo) 1941 { 1942 struct team *team = netdev_priv(dev); 1943 struct team_port *port; 1944 int err = 0; 1945 1946 mutex_lock(&team->lock); 1947 list_for_each_entry(port, &team->port_list, list) { 1948 err = __team_port_enable_netpoll(port); 1949 if (err) { 1950 __team_netpoll_cleanup(team); 1951 break; 1952 } 1953 } 1954 mutex_unlock(&team->lock); 1955 return err; 1956 } 1957 #endif 1958 1959 static int team_add_slave(struct net_device *dev, struct net_device *port_dev, 1960 struct netlink_ext_ack *extack) 1961 { 1962 struct team *team = netdev_priv(dev); 1963 int err; 1964 1965 mutex_lock(&team->lock); 1966 err = team_port_add(team, port_dev, extack); 1967 mutex_unlock(&team->lock); 1968 1969 if (!err) 1970 netdev_change_features(dev); 1971 1972 return err; 1973 } 1974 1975 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1976 { 1977 struct team *team = netdev_priv(dev); 1978 int err; 1979 1980 mutex_lock(&team->lock); 1981 err = team_port_del(team, port_dev); 1982 mutex_unlock(&team->lock); 1983 1984 if (err) 1985 return err; 1986 1987 if (netif_is_team_master(port_dev)) { 1988 lockdep_unregister_key(&team->team_lock_key); 1989 lockdep_register_key(&team->team_lock_key); 1990 lockdep_set_class(&team->lock, &team->team_lock_key); 1991 } 1992 netdev_change_features(dev); 1993 1994 return err; 1995 } 1996 1997 static netdev_features_t team_fix_features(struct net_device *dev, 1998 netdev_features_t features) 1999 { 2000 struct team_port *port; 2001 struct team *team = netdev_priv(dev); 2002 netdev_features_t mask; 2003 2004 mask = features; 2005 features &= ~NETIF_F_ONE_FOR_ALL; 2006 features |= NETIF_F_ALL_FOR_ALL; 2007 2008 rcu_read_lock(); 2009 list_for_each_entry_rcu(port, &team->port_list, list) { 2010 features = netdev_increment_features(features, 2011 port->dev->features, 2012 mask); 2013 } 2014 rcu_read_unlock(); 2015 2016 features = netdev_add_tso_features(features, mask); 2017 2018 return features; 2019 } 2020 2021 static int team_change_carrier(struct net_device *dev, bool new_carrier) 2022 { 2023 struct team *team = netdev_priv(dev); 2024 2025 team->user_carrier_enabled = true; 2026 2027 if (new_carrier) 2028 netif_carrier_on(dev); 2029 else 2030 netif_carrier_off(dev); 2031 return 0; 2032 } 2033 2034 static const struct net_device_ops team_netdev_ops = { 2035 .ndo_init = team_init, 2036 .ndo_uninit = team_uninit, 2037 .ndo_open = team_open, 2038 .ndo_stop = team_close, 2039 .ndo_start_xmit = team_xmit, 2040 .ndo_select_queue = team_select_queue, 2041 .ndo_change_rx_flags = team_change_rx_flags, 2042 .ndo_set_rx_mode = team_set_rx_mode, 2043 .ndo_set_mac_address = team_set_mac_address, 2044 .ndo_change_mtu = team_change_mtu, 2045 .ndo_get_stats64 = team_get_stats64, 2046 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 2047 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 2048 #ifdef CONFIG_NET_POLL_CONTROLLER 2049 .ndo_poll_controller = team_poll_controller, 2050 .ndo_netpoll_setup = team_netpoll_setup, 2051 .ndo_netpoll_cleanup = team_netpoll_cleanup, 2052 #endif 2053 .ndo_add_slave = team_add_slave, 2054 .ndo_del_slave = team_del_slave, 2055 .ndo_fix_features = team_fix_features, 2056 .ndo_change_carrier = team_change_carrier, 2057 .ndo_features_check = passthru_features_check, 2058 }; 2059 2060 /*********************** 2061 * ethtool interface 2062 ***********************/ 2063 2064 static void team_ethtool_get_drvinfo(struct net_device *dev, 2065 struct ethtool_drvinfo *drvinfo) 2066 { 2067 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 2068 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version)); 2069 } 2070 2071 static int team_ethtool_get_link_ksettings(struct net_device *dev, 2072 struct ethtool_link_ksettings *cmd) 2073 { 2074 struct team *team= netdev_priv(dev); 2075 unsigned long speed = 0; 2076 struct team_port *port; 2077 2078 cmd->base.duplex = DUPLEX_UNKNOWN; 2079 cmd->base.port = PORT_OTHER; 2080 2081 rcu_read_lock(); 2082 list_for_each_entry_rcu(port, &team->port_list, list) { 2083 if (team_port_txable(port)) { 2084 if (port->state.speed != SPEED_UNKNOWN) 2085 speed += port->state.speed; 2086 if (cmd->base.duplex == DUPLEX_UNKNOWN && 2087 port->state.duplex != DUPLEX_UNKNOWN) 2088 cmd->base.duplex = port->state.duplex; 2089 } 2090 } 2091 rcu_read_unlock(); 2092 2093 cmd->base.speed = speed ? : SPEED_UNKNOWN; 2094 2095 return 0; 2096 } 2097 2098 static const struct ethtool_ops team_ethtool_ops = { 2099 .get_drvinfo = team_ethtool_get_drvinfo, 2100 .get_link = ethtool_op_get_link, 2101 .get_link_ksettings = team_ethtool_get_link_ksettings, 2102 }; 2103 2104 /*********************** 2105 * rt netlink interface 2106 ***********************/ 2107 2108 static void team_setup_by_port(struct net_device *dev, 2109 struct net_device *port_dev) 2110 { 2111 dev->header_ops = port_dev->header_ops; 2112 dev->type = port_dev->type; 2113 dev->hard_header_len = port_dev->hard_header_len; 2114 dev->needed_headroom = port_dev->needed_headroom; 2115 dev->addr_len = port_dev->addr_len; 2116 dev->mtu = port_dev->mtu; 2117 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2118 eth_hw_addr_inherit(dev, port_dev); 2119 } 2120 2121 static int team_dev_type_check_change(struct net_device *dev, 2122 struct net_device *port_dev) 2123 { 2124 struct team *team = netdev_priv(dev); 2125 char *portname = port_dev->name; 2126 int err; 2127 2128 if (dev->type == port_dev->type) 2129 return 0; 2130 if (!list_empty(&team->port_list)) { 2131 netdev_err(dev, "Device %s is of different type\n", portname); 2132 return -EBUSY; 2133 } 2134 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2135 err = notifier_to_errno(err); 2136 if (err) { 2137 netdev_err(dev, "Refused to change device type\n"); 2138 return err; 2139 } 2140 dev_uc_flush(dev); 2141 dev_mc_flush(dev); 2142 team_setup_by_port(dev, port_dev); 2143 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2144 return 0; 2145 } 2146 2147 static void team_setup(struct net_device *dev) 2148 { 2149 ether_setup(dev); 2150 dev->max_mtu = ETH_MAX_MTU; 2151 2152 dev->netdev_ops = &team_netdev_ops; 2153 dev->ethtool_ops = &team_ethtool_ops; 2154 dev->needs_free_netdev = true; 2155 dev->priv_destructor = team_destructor; 2156 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2157 dev->priv_flags |= IFF_NO_QUEUE; 2158 dev->priv_flags |= IFF_TEAM; 2159 2160 /* 2161 * Indicate we support unicast address filtering. That way core won't 2162 * bring us to promisc mode in case a unicast addr is added. 2163 * Let this up to underlay drivers. 2164 */ 2165 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2166 2167 dev->features |= NETIF_F_LLTX; 2168 dev->features |= NETIF_F_GRO; 2169 2170 /* Don't allow team devices to change network namespaces. */ 2171 dev->features |= NETIF_F_NETNS_LOCAL; 2172 2173 dev->hw_features = TEAM_VLAN_FEATURES | 2174 NETIF_F_HW_VLAN_CTAG_RX | 2175 NETIF_F_HW_VLAN_CTAG_FILTER; 2176 2177 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL; 2178 dev->features |= dev->hw_features; 2179 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; 2180 } 2181 2182 static int team_newlink(struct net *src_net, struct net_device *dev, 2183 struct nlattr *tb[], struct nlattr *data[], 2184 struct netlink_ext_ack *extack) 2185 { 2186 if (tb[IFLA_ADDRESS] == NULL) 2187 eth_hw_addr_random(dev); 2188 2189 return register_netdevice(dev); 2190 } 2191 2192 static int team_validate(struct nlattr *tb[], struct nlattr *data[], 2193 struct netlink_ext_ack *extack) 2194 { 2195 if (tb[IFLA_ADDRESS]) { 2196 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2197 return -EINVAL; 2198 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2199 return -EADDRNOTAVAIL; 2200 } 2201 return 0; 2202 } 2203 2204 static unsigned int team_get_num_tx_queues(void) 2205 { 2206 return TEAM_DEFAULT_NUM_TX_QUEUES; 2207 } 2208 2209 static unsigned int team_get_num_rx_queues(void) 2210 { 2211 return TEAM_DEFAULT_NUM_RX_QUEUES; 2212 } 2213 2214 static struct rtnl_link_ops team_link_ops __read_mostly = { 2215 .kind = DRV_NAME, 2216 .priv_size = sizeof(struct team), 2217 .setup = team_setup, 2218 .newlink = team_newlink, 2219 .validate = team_validate, 2220 .get_num_tx_queues = team_get_num_tx_queues, 2221 .get_num_rx_queues = team_get_num_rx_queues, 2222 }; 2223 2224 2225 /*********************************** 2226 * Generic netlink custom interface 2227 ***********************************/ 2228 2229 static struct genl_family team_nl_family; 2230 2231 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { 2232 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, 2233 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, 2234 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, 2235 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, 2236 }; 2237 2238 static const struct nla_policy 2239 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { 2240 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, 2241 [TEAM_ATTR_OPTION_NAME] = { 2242 .type = NLA_STRING, 2243 .len = TEAM_STRING_MAX_LEN, 2244 }, 2245 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, 2246 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, 2247 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY }, 2248 [TEAM_ATTR_OPTION_PORT_IFINDEX] = { .type = NLA_U32 }, 2249 [TEAM_ATTR_OPTION_ARRAY_INDEX] = { .type = NLA_U32 }, 2250 }; 2251 2252 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) 2253 { 2254 struct sk_buff *msg; 2255 void *hdr; 2256 int err; 2257 2258 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2259 if (!msg) 2260 return -ENOMEM; 2261 2262 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2263 &team_nl_family, 0, TEAM_CMD_NOOP); 2264 if (!hdr) { 2265 err = -EMSGSIZE; 2266 goto err_msg_put; 2267 } 2268 2269 genlmsg_end(msg, hdr); 2270 2271 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2272 2273 err_msg_put: 2274 nlmsg_free(msg); 2275 2276 return err; 2277 } 2278 2279 /* 2280 * Netlink cmd functions should be locked by following two functions. 2281 * Since dev gets held here, that ensures dev won't disappear in between. 2282 */ 2283 static struct team *team_nl_team_get(struct genl_info *info) 2284 { 2285 struct net *net = genl_info_net(info); 2286 int ifindex; 2287 struct net_device *dev; 2288 struct team *team; 2289 2290 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2291 return NULL; 2292 2293 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2294 dev = dev_get_by_index(net, ifindex); 2295 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2296 if (dev) 2297 dev_put(dev); 2298 return NULL; 2299 } 2300 2301 team = netdev_priv(dev); 2302 mutex_lock(&team->lock); 2303 return team; 2304 } 2305 2306 static void team_nl_team_put(struct team *team) 2307 { 2308 mutex_unlock(&team->lock); 2309 dev_put(team->dev); 2310 } 2311 2312 typedef int team_nl_send_func_t(struct sk_buff *skb, 2313 struct team *team, u32 portid); 2314 2315 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2316 { 2317 return genlmsg_unicast(dev_net(team->dev), skb, portid); 2318 } 2319 2320 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2321 struct team_option_inst *opt_inst) 2322 { 2323 struct nlattr *option_item; 2324 struct team_option *option = opt_inst->option; 2325 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2326 struct team_gsetter_ctx ctx; 2327 int err; 2328 2329 ctx.info = opt_inst_info; 2330 err = team_option_get(team, opt_inst, &ctx); 2331 if (err) 2332 return err; 2333 2334 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION); 2335 if (!option_item) 2336 return -EMSGSIZE; 2337 2338 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2339 goto nest_cancel; 2340 if (opt_inst_info->port && 2341 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2342 opt_inst_info->port->dev->ifindex)) 2343 goto nest_cancel; 2344 if (opt_inst->option->array_size && 2345 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2346 opt_inst_info->array_index)) 2347 goto nest_cancel; 2348 2349 switch (option->type) { 2350 case TEAM_OPTION_TYPE_U32: 2351 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2352 goto nest_cancel; 2353 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2354 goto nest_cancel; 2355 break; 2356 case TEAM_OPTION_TYPE_STRING: 2357 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2358 goto nest_cancel; 2359 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2360 ctx.data.str_val)) 2361 goto nest_cancel; 2362 break; 2363 case TEAM_OPTION_TYPE_BINARY: 2364 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2365 goto nest_cancel; 2366 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2367 ctx.data.bin_val.ptr)) 2368 goto nest_cancel; 2369 break; 2370 case TEAM_OPTION_TYPE_BOOL: 2371 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2372 goto nest_cancel; 2373 if (ctx.data.bool_val && 2374 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2375 goto nest_cancel; 2376 break; 2377 case TEAM_OPTION_TYPE_S32: 2378 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2379 goto nest_cancel; 2380 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2381 goto nest_cancel; 2382 break; 2383 default: 2384 BUG(); 2385 } 2386 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2387 goto nest_cancel; 2388 if (opt_inst->changed) { 2389 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2390 goto nest_cancel; 2391 opt_inst->changed = false; 2392 } 2393 nla_nest_end(skb, option_item); 2394 return 0; 2395 2396 nest_cancel: 2397 nla_nest_cancel(skb, option_item); 2398 return -EMSGSIZE; 2399 } 2400 2401 static int __send_and_alloc_skb(struct sk_buff **pskb, 2402 struct team *team, u32 portid, 2403 team_nl_send_func_t *send_func) 2404 { 2405 int err; 2406 2407 if (*pskb) { 2408 err = send_func(*pskb, team, portid); 2409 if (err) 2410 return err; 2411 } 2412 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2413 if (!*pskb) 2414 return -ENOMEM; 2415 return 0; 2416 } 2417 2418 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2419 int flags, team_nl_send_func_t *send_func, 2420 struct list_head *sel_opt_inst_list) 2421 { 2422 struct nlattr *option_list; 2423 struct nlmsghdr *nlh; 2424 void *hdr; 2425 struct team_option_inst *opt_inst; 2426 int err; 2427 struct sk_buff *skb = NULL; 2428 bool incomplete; 2429 int i; 2430 2431 opt_inst = list_first_entry(sel_opt_inst_list, 2432 struct team_option_inst, tmp_list); 2433 2434 start_again: 2435 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2436 if (err) 2437 return err; 2438 2439 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2440 TEAM_CMD_OPTIONS_GET); 2441 if (!hdr) { 2442 nlmsg_free(skb); 2443 return -EMSGSIZE; 2444 } 2445 2446 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2447 goto nla_put_failure; 2448 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION); 2449 if (!option_list) 2450 goto nla_put_failure; 2451 2452 i = 0; 2453 incomplete = false; 2454 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2455 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2456 if (err) { 2457 if (err == -EMSGSIZE) { 2458 if (!i) 2459 goto errout; 2460 incomplete = true; 2461 break; 2462 } 2463 goto errout; 2464 } 2465 i++; 2466 } 2467 2468 nla_nest_end(skb, option_list); 2469 genlmsg_end(skb, hdr); 2470 if (incomplete) 2471 goto start_again; 2472 2473 send_done: 2474 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2475 if (!nlh) { 2476 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2477 if (err) 2478 return err; 2479 goto send_done; 2480 } 2481 2482 return send_func(skb, team, portid); 2483 2484 nla_put_failure: 2485 err = -EMSGSIZE; 2486 errout: 2487 nlmsg_free(skb); 2488 return err; 2489 } 2490 2491 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) 2492 { 2493 struct team *team; 2494 struct team_option_inst *opt_inst; 2495 int err; 2496 LIST_HEAD(sel_opt_inst_list); 2497 2498 team = team_nl_team_get(info); 2499 if (!team) 2500 return -EINVAL; 2501 2502 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2503 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2504 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2505 NLM_F_ACK, team_nl_send_unicast, 2506 &sel_opt_inst_list); 2507 2508 team_nl_team_put(team); 2509 2510 return err; 2511 } 2512 2513 static int team_nl_send_event_options_get(struct team *team, 2514 struct list_head *sel_opt_inst_list); 2515 2516 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) 2517 { 2518 struct team *team; 2519 int err = 0; 2520 int i; 2521 struct nlattr *nl_option; 2522 2523 rtnl_lock(); 2524 2525 team = team_nl_team_get(info); 2526 if (!team) { 2527 err = -EINVAL; 2528 goto rtnl_unlock; 2529 } 2530 2531 err = -EINVAL; 2532 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2533 err = -EINVAL; 2534 goto team_put; 2535 } 2536 2537 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2538 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2539 struct nlattr *attr; 2540 struct nlattr *attr_data; 2541 LIST_HEAD(opt_inst_list); 2542 enum team_option_type opt_type; 2543 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2544 u32 opt_array_index = 0; 2545 bool opt_is_array = false; 2546 struct team_option_inst *opt_inst; 2547 char *opt_name; 2548 bool opt_found = false; 2549 2550 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2551 err = -EINVAL; 2552 goto team_put; 2553 } 2554 err = nla_parse_nested_deprecated(opt_attrs, 2555 TEAM_ATTR_OPTION_MAX, 2556 nl_option, 2557 team_nl_option_policy, 2558 info->extack); 2559 if (err) 2560 goto team_put; 2561 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2562 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2563 err = -EINVAL; 2564 goto team_put; 2565 } 2566 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2567 case NLA_U32: 2568 opt_type = TEAM_OPTION_TYPE_U32; 2569 break; 2570 case NLA_STRING: 2571 opt_type = TEAM_OPTION_TYPE_STRING; 2572 break; 2573 case NLA_BINARY: 2574 opt_type = TEAM_OPTION_TYPE_BINARY; 2575 break; 2576 case NLA_FLAG: 2577 opt_type = TEAM_OPTION_TYPE_BOOL; 2578 break; 2579 case NLA_S32: 2580 opt_type = TEAM_OPTION_TYPE_S32; 2581 break; 2582 default: 2583 goto team_put; 2584 } 2585 2586 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2587 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2588 err = -EINVAL; 2589 goto team_put; 2590 } 2591 2592 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2593 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2594 if (attr) 2595 opt_port_ifindex = nla_get_u32(attr); 2596 2597 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2598 if (attr) { 2599 opt_is_array = true; 2600 opt_array_index = nla_get_u32(attr); 2601 } 2602 2603 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2604 struct team_option *option = opt_inst->option; 2605 struct team_gsetter_ctx ctx; 2606 struct team_option_inst_info *opt_inst_info; 2607 int tmp_ifindex; 2608 2609 opt_inst_info = &opt_inst->info; 2610 tmp_ifindex = opt_inst_info->port ? 2611 opt_inst_info->port->dev->ifindex : 0; 2612 if (option->type != opt_type || 2613 strcmp(option->name, opt_name) || 2614 tmp_ifindex != opt_port_ifindex || 2615 (option->array_size && !opt_is_array) || 2616 opt_inst_info->array_index != opt_array_index) 2617 continue; 2618 opt_found = true; 2619 ctx.info = opt_inst_info; 2620 switch (opt_type) { 2621 case TEAM_OPTION_TYPE_U32: 2622 ctx.data.u32_val = nla_get_u32(attr_data); 2623 break; 2624 case TEAM_OPTION_TYPE_STRING: 2625 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) { 2626 err = -EINVAL; 2627 goto team_put; 2628 } 2629 ctx.data.str_val = nla_data(attr_data); 2630 break; 2631 case TEAM_OPTION_TYPE_BINARY: 2632 ctx.data.bin_val.len = nla_len(attr_data); 2633 ctx.data.bin_val.ptr = nla_data(attr_data); 2634 break; 2635 case TEAM_OPTION_TYPE_BOOL: 2636 ctx.data.bool_val = attr_data ? true : false; 2637 break; 2638 case TEAM_OPTION_TYPE_S32: 2639 ctx.data.s32_val = nla_get_s32(attr_data); 2640 break; 2641 default: 2642 BUG(); 2643 } 2644 err = team_option_set(team, opt_inst, &ctx); 2645 if (err) 2646 goto team_put; 2647 opt_inst->changed = true; 2648 list_add(&opt_inst->tmp_list, &opt_inst_list); 2649 } 2650 if (!opt_found) { 2651 err = -ENOENT; 2652 goto team_put; 2653 } 2654 2655 err = team_nl_send_event_options_get(team, &opt_inst_list); 2656 if (err) 2657 break; 2658 } 2659 2660 team_put: 2661 team_nl_team_put(team); 2662 rtnl_unlock: 2663 rtnl_unlock(); 2664 return err; 2665 } 2666 2667 static int team_nl_fill_one_port_get(struct sk_buff *skb, 2668 struct team_port *port) 2669 { 2670 struct nlattr *port_item; 2671 2672 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT); 2673 if (!port_item) 2674 goto nest_cancel; 2675 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2676 goto nest_cancel; 2677 if (port->changed) { 2678 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2679 goto nest_cancel; 2680 port->changed = false; 2681 } 2682 if ((port->removed && 2683 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2684 (port->state.linkup && 2685 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2686 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2687 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2688 goto nest_cancel; 2689 nla_nest_end(skb, port_item); 2690 return 0; 2691 2692 nest_cancel: 2693 nla_nest_cancel(skb, port_item); 2694 return -EMSGSIZE; 2695 } 2696 2697 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2698 int flags, team_nl_send_func_t *send_func, 2699 struct team_port *one_port) 2700 { 2701 struct nlattr *port_list; 2702 struct nlmsghdr *nlh; 2703 void *hdr; 2704 struct team_port *port; 2705 int err; 2706 struct sk_buff *skb = NULL; 2707 bool incomplete; 2708 int i; 2709 2710 port = list_first_entry_or_null(&team->port_list, 2711 struct team_port, list); 2712 2713 start_again: 2714 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2715 if (err) 2716 return err; 2717 2718 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2719 TEAM_CMD_PORT_LIST_GET); 2720 if (!hdr) { 2721 nlmsg_free(skb); 2722 return -EMSGSIZE; 2723 } 2724 2725 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2726 goto nla_put_failure; 2727 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT); 2728 if (!port_list) 2729 goto nla_put_failure; 2730 2731 i = 0; 2732 incomplete = false; 2733 2734 /* If one port is selected, called wants to send port list containing 2735 * only this port. Otherwise go through all listed ports and send all 2736 */ 2737 if (one_port) { 2738 err = team_nl_fill_one_port_get(skb, one_port); 2739 if (err) 2740 goto errout; 2741 } else if (port) { 2742 list_for_each_entry_from(port, &team->port_list, list) { 2743 err = team_nl_fill_one_port_get(skb, port); 2744 if (err) { 2745 if (err == -EMSGSIZE) { 2746 if (!i) 2747 goto errout; 2748 incomplete = true; 2749 break; 2750 } 2751 goto errout; 2752 } 2753 i++; 2754 } 2755 } 2756 2757 nla_nest_end(skb, port_list); 2758 genlmsg_end(skb, hdr); 2759 if (incomplete) 2760 goto start_again; 2761 2762 send_done: 2763 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2764 if (!nlh) { 2765 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2766 if (err) 2767 return err; 2768 goto send_done; 2769 } 2770 2771 return send_func(skb, team, portid); 2772 2773 nla_put_failure: 2774 err = -EMSGSIZE; 2775 errout: 2776 nlmsg_free(skb); 2777 return err; 2778 } 2779 2780 static int team_nl_cmd_port_list_get(struct sk_buff *skb, 2781 struct genl_info *info) 2782 { 2783 struct team *team; 2784 int err; 2785 2786 team = team_nl_team_get(info); 2787 if (!team) 2788 return -EINVAL; 2789 2790 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 2791 NLM_F_ACK, team_nl_send_unicast, NULL); 2792 2793 team_nl_team_put(team); 2794 2795 return err; 2796 } 2797 2798 static const struct genl_small_ops team_nl_ops[] = { 2799 { 2800 .cmd = TEAM_CMD_NOOP, 2801 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2802 .doit = team_nl_cmd_noop, 2803 }, 2804 { 2805 .cmd = TEAM_CMD_OPTIONS_SET, 2806 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2807 .doit = team_nl_cmd_options_set, 2808 .flags = GENL_ADMIN_PERM, 2809 }, 2810 { 2811 .cmd = TEAM_CMD_OPTIONS_GET, 2812 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2813 .doit = team_nl_cmd_options_get, 2814 .flags = GENL_ADMIN_PERM, 2815 }, 2816 { 2817 .cmd = TEAM_CMD_PORT_LIST_GET, 2818 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2819 .doit = team_nl_cmd_port_list_get, 2820 .flags = GENL_ADMIN_PERM, 2821 }, 2822 }; 2823 2824 static const struct genl_multicast_group team_nl_mcgrps[] = { 2825 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 2826 }; 2827 2828 static struct genl_family team_nl_family __ro_after_init = { 2829 .name = TEAM_GENL_NAME, 2830 .version = TEAM_GENL_VERSION, 2831 .maxattr = TEAM_ATTR_MAX, 2832 .policy = team_nl_policy, 2833 .netnsok = true, 2834 .module = THIS_MODULE, 2835 .small_ops = team_nl_ops, 2836 .n_small_ops = ARRAY_SIZE(team_nl_ops), 2837 .mcgrps = team_nl_mcgrps, 2838 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps), 2839 }; 2840 2841 static int team_nl_send_multicast(struct sk_buff *skb, 2842 struct team *team, u32 portid) 2843 { 2844 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev), 2845 skb, 0, 0, GFP_KERNEL); 2846 } 2847 2848 static int team_nl_send_event_options_get(struct team *team, 2849 struct list_head *sel_opt_inst_list) 2850 { 2851 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 2852 sel_opt_inst_list); 2853 } 2854 2855 static int team_nl_send_event_port_get(struct team *team, 2856 struct team_port *port) 2857 { 2858 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 2859 port); 2860 } 2861 2862 static int __init team_nl_init(void) 2863 { 2864 return genl_register_family(&team_nl_family); 2865 } 2866 2867 static void team_nl_fini(void) 2868 { 2869 genl_unregister_family(&team_nl_family); 2870 } 2871 2872 2873 /****************** 2874 * Change checkers 2875 ******************/ 2876 2877 static void __team_options_change_check(struct team *team) 2878 { 2879 int err; 2880 struct team_option_inst *opt_inst; 2881 LIST_HEAD(sel_opt_inst_list); 2882 2883 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2884 if (opt_inst->changed) 2885 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2886 } 2887 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2888 if (err && err != -ESRCH) 2889 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n", 2890 err); 2891 } 2892 2893 /* rtnl lock is held */ 2894 2895 static void __team_port_change_send(struct team_port *port, bool linkup) 2896 { 2897 int err; 2898 2899 port->changed = true; 2900 port->state.linkup = linkup; 2901 team_refresh_port_linkup(port); 2902 if (linkup) { 2903 struct ethtool_link_ksettings ecmd; 2904 2905 err = __ethtool_get_link_ksettings(port->dev, &ecmd); 2906 if (!err) { 2907 port->state.speed = ecmd.base.speed; 2908 port->state.duplex = ecmd.base.duplex; 2909 goto send_event; 2910 } 2911 } 2912 port->state.speed = 0; 2913 port->state.duplex = 0; 2914 2915 send_event: 2916 err = team_nl_send_event_port_get(port->team, port); 2917 if (err && err != -ESRCH) 2918 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n", 2919 port->dev->name, err); 2920 2921 } 2922 2923 static void __team_carrier_check(struct team *team) 2924 { 2925 struct team_port *port; 2926 bool team_linkup; 2927 2928 if (team->user_carrier_enabled) 2929 return; 2930 2931 team_linkup = false; 2932 list_for_each_entry(port, &team->port_list, list) { 2933 if (port->linkup) { 2934 team_linkup = true; 2935 break; 2936 } 2937 } 2938 2939 if (team_linkup) 2940 netif_carrier_on(team->dev); 2941 else 2942 netif_carrier_off(team->dev); 2943 } 2944 2945 static void __team_port_change_check(struct team_port *port, bool linkup) 2946 { 2947 if (port->state.linkup != linkup) 2948 __team_port_change_send(port, linkup); 2949 __team_carrier_check(port->team); 2950 } 2951 2952 static void __team_port_change_port_added(struct team_port *port, bool linkup) 2953 { 2954 __team_port_change_send(port, linkup); 2955 __team_carrier_check(port->team); 2956 } 2957 2958 static void __team_port_change_port_removed(struct team_port *port) 2959 { 2960 port->removed = true; 2961 __team_port_change_send(port, false); 2962 __team_carrier_check(port->team); 2963 } 2964 2965 static void team_port_change_check(struct team_port *port, bool linkup) 2966 { 2967 struct team *team = port->team; 2968 2969 mutex_lock(&team->lock); 2970 __team_port_change_check(port, linkup); 2971 mutex_unlock(&team->lock); 2972 } 2973 2974 2975 /************************************ 2976 * Net device notifier event handler 2977 ************************************/ 2978 2979 static int team_device_event(struct notifier_block *unused, 2980 unsigned long event, void *ptr) 2981 { 2982 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2983 struct team_port *port; 2984 2985 port = team_port_get_rtnl(dev); 2986 if (!port) 2987 return NOTIFY_DONE; 2988 2989 switch (event) { 2990 case NETDEV_UP: 2991 if (netif_oper_up(dev)) 2992 team_port_change_check(port, true); 2993 break; 2994 case NETDEV_DOWN: 2995 team_port_change_check(port, false); 2996 break; 2997 case NETDEV_CHANGE: 2998 if (netif_running(port->dev)) 2999 team_port_change_check(port, 3000 !!netif_oper_up(port->dev)); 3001 break; 3002 case NETDEV_UNREGISTER: 3003 team_del_slave(port->team->dev, dev); 3004 break; 3005 case NETDEV_FEAT_CHANGE: 3006 team_compute_features(port->team); 3007 break; 3008 case NETDEV_PRECHANGEMTU: 3009 /* Forbid to change mtu of underlaying device */ 3010 if (!port->team->port_mtu_change_allowed) 3011 return NOTIFY_BAD; 3012 break; 3013 case NETDEV_PRE_TYPE_CHANGE: 3014 /* Forbid to change type of underlaying device */ 3015 return NOTIFY_BAD; 3016 case NETDEV_RESEND_IGMP: 3017 /* Propagate to master device */ 3018 call_netdevice_notifiers(event, port->team->dev); 3019 break; 3020 } 3021 return NOTIFY_DONE; 3022 } 3023 3024 static struct notifier_block team_notifier_block __read_mostly = { 3025 .notifier_call = team_device_event, 3026 }; 3027 3028 3029 /*********************** 3030 * Module init and exit 3031 ***********************/ 3032 3033 static int __init team_module_init(void) 3034 { 3035 int err; 3036 3037 register_netdevice_notifier(&team_notifier_block); 3038 3039 err = rtnl_link_register(&team_link_ops); 3040 if (err) 3041 goto err_rtnl_reg; 3042 3043 err = team_nl_init(); 3044 if (err) 3045 goto err_nl_init; 3046 3047 return 0; 3048 3049 err_nl_init: 3050 rtnl_link_unregister(&team_link_ops); 3051 3052 err_rtnl_reg: 3053 unregister_netdevice_notifier(&team_notifier_block); 3054 3055 return err; 3056 } 3057 3058 static void __exit team_module_exit(void) 3059 { 3060 team_nl_fini(); 3061 rtnl_link_unregister(&team_link_ops); 3062 unregister_netdevice_notifier(&team_notifier_block); 3063 } 3064 3065 module_init(team_module_init); 3066 module_exit(team_module_exit); 3067 3068 MODULE_LICENSE("GPL v2"); 3069 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 3070 MODULE_DESCRIPTION("Ethernet team device driver"); 3071 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 3072